Electronic temperature switch

An electronic temperature switch device, comprising:

• an electronic temperature switch circuit;
• a temperature sensor;
• and
• a housing for housing the electronic temperature switch circuit and at least a portion of the temperature sensor;
• wherein the electronic temperature switch circuit, includes:
• an evaluator circuit that that receives a temperature signal comprising an electrical signal representing a sensed temperature, wherein the evaluator circuit compares said temperature signal to a lower threshold value and an upper threshold value, and generates an evaluation signal having a value indicating when said temperature signal is between the lower threshold value and the upper threshold value;
• and
• a loading circuit that receives said evaluation signal, wherein the loading circuit comprises an electronic loading switch that is turned on to couple a first indication signal across a pair of contact terminals when the value of the evaluation signal is between the lower threshold value and the upper threshold value, and wherein the electronic loading switch is turned off to couple a second indication signal across said pair of contact terminals when the value of the evaluation signal is either below the lower threshold value or above the upper threshold value.

An electronic temperature switch device, comprising:

• an electronic temperature switch circuit;
• a temperature sensor;
• and
• a housing for housing the electronic temperature switch circuit and at least a portion of the temperature sensor;
• wherein the electronic temperature switch circuit, includes:
• a measurement circuit that senses a temperature and generates a temperature signal corresponding to the sensed temperature;
• an evaluator circuit that that receives said temperature signal comprising an electrical signal representing a sensed temperature, wherein the evaluator circuit compares said temperature signal to a lower threshold value and an upper threshold value, and generates an evaluation signal having a value indicating when said temperature signal is between the lower threshold value and the upper threshold value;
• and
• a loading circuit that receives said evaluation signal, wherein the loading circuit comprises an electronic loading switch that is turned on to couple a first indication signal across a pair of contact terminals when the value of the evaluation signal is between the lower threshold value and the upper threshold value, and wherein the electronic loading switch is turned off to couple a second indication signal across said pair of contact terminals when the value of the evaluation signal is either below the lower threshold value or above the upper threshold value;
• and
• wherein the evaluator circuit has an evaluation circuit ratio independent of power supply voltage, the measurement circuit enhances signal-to-noise-ratio of the temperature signal for input to the evaluator circuit.